I have Snow Leopard. I installed rEFIt via the package. Then I installed Ubuntu via this guide: https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation

Afterwards everything worked, and I could even boot Ubuntu without using rEFIt. I decided to uninstall rEFIt since I had no need for it. So I followed the instructions here exactly: https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation

That is, I trashed the efi folder and the rEFItBlesser folder.

It would not boot. So I did target disk mode from another Mac and managed to move the files from the trash back into place. It still would not boot. So I booted from the Mac OSX Install Disk (actually on a USB since my disk drive doesn't work), and used Disk Utility to repair permissions and repair disk. It still will not boot.

How can I save my Mac? I don't mind reinstalling rEFIt or removing it, as long as it works at this point. Please this is quite urgent : (